IBM PC 100, Техническое руководство

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Chapter 1. System Description
Power Supply
The power supply converts the ac input voltage into four dc output voltages and provides power for the
following:
Ÿ
System board
Ÿ
Adapters
Ÿ
Internal DASD drives
Ÿ
Keyboard and auxiliary devices
PC 100 and PC 300 computers have a 145-watt power supply. The following figure shows the input
power specifications. The power available for each component within the system is shown in Figure 10
on page 12.
Power Output Parameters
The power supply dc outputs shown in the following figure include the current supply capability of all the
connectors including system board, DASD, PCI, and auxiliary outputs.
Figure 8. AC Input Power Requirements
Specification Measurements
Input voltage (Range is switch selected; sine wave input is required.)
Low range 110 (min)–127 (max) V ac
High range 200 (min)–240 (max) V ac
Input frequency
50 Hz
±
3 Hz or 60 Hz
±
3 Hz
Figure 9. Power Output Parameters (145 Watt)
Output Voltage Regulation Minimum Current (amps) Maximum Current (amps)
+5 volts +5% to -4% 1.5 A 18.0 A
+12 volts +5% to -4% 0.2 A 4.2 A
-12 volts +10% to -9% 0.0 A 0.4 A
-5 volts +5% to -4% 0.0 A 0.3 A
Chapter 1. System Description
11